Read all of the posts in this thread and still have no solution. Is it specific to the "WiFi Only" devices? Unfortunately, I cannot buy a new router since I'm not using one in the first place. I'm very annoyed with Samsung claiming that they knew nothing of this problem. Clearly, I'm not alone. I wrote the following yesterday on a different thread in android forum........
Samsung Galaxy Note 10.1 2014 with
Samsung Galaxy Note 3 Hotspot
I recently purchased the Samsung Galaxy Tablet/Note (wish Samsung would decide whether a Note was a phone or a Tablet and be consistent) 10.1 2014 (WiFi only). I also have the Samsung Galaxy Note (phone) with Verizon. I added a mobile hot spot plan ($30/mo.) to use with my phone. Horrible, horrible internet connection too. Why have a Tablet? Just spent several hours on the phone with Samsung and Verizon. Samsung talked to me like I was a moron and suggested my personal favorite solution......"Factory Data Reset". In other words.....they have no idea how to fix it. The guy at Verizon was understanding and, thankfully, intelligent, but all he could come up with was that it was a problem with the phone since the internet connection was marginally better with my Jet Pack (wireless Internet, also with Verizon--I do not have a "wired" internet connection available to me). Well, the Jet Pack isn't really working now either. Watching YouTube is impossible. The internet crashes all of the time requiring complete reboot. Ran Speedtest (available on Play Store) and had 17.82mbps download and 8.33mbps upload (not bad). After reading other posts, it doesn't sound like it's the phone either unless Samsung changed something in the phone since I purchased it in November. Verizon kindly agreed to send me a new phone to arrive tomorrow. Where to go from here is anybody's guess. Software (Tablet) problem does sound more feasible. Multiple calls to Samsung might eventually reach someone who can think and will actually try to help and NOT immediately suggest "Factory Data Reset". Hope we all get an answer soon. Wish I could have helped more, but maybe my experience will help you narrow down the possibilities
P.S. Samsung.....I anxiously await the fix for "Smart Stay" to recognize that I am looking at my device with my (necessary) eyeglasses.
Samsung Galaxy Note 10.1 2014 with
Samsung Galaxy Note 3 Hotspot
I recently purchased the Samsung Galaxy Tablet/Note (wish Samsung would decide whether a Note was a phone or a Tablet and be consistent) 10.1 2014 (WiFi only). I also have the Samsung Galaxy Note (phone) with Verizon. I added a mobile hot spot plan ($30/mo.) to use with my phone. Horrible, horrible internet connection too. Why have a Tablet? Just spent several hours on the phone with Samsung and Verizon. Samsung talked to me like I was a moron and suggested my personal favorite solution......"Factory Data Reset". In other words.....they have no idea how to fix it. The guy at Verizon was understanding and, thankfully, intelligent, but all he could come up with was that it was a problem with the phone since the internet connection was marginally better with my Jet Pack (wireless Internet, also with Verizon--I do not have a "wired" internet connection available to me). Well, the Jet Pack isn't really working now either. Watching YouTube is impossible. The internet crashes all of the time requiring complete reboot. Ran Speedtest (available on Play Store) and had 17.82mbps download and 8.33mbps upload (not bad). After reading other posts, it doesn't sound like it's the phone either unless Samsung changed something in the phone since I purchased it in November. Verizon kindly agreed to send me a new phone to arrive tomorrow. Where to go from here is anybody's guess. Software (Tablet) problem does sound more feasible. Multiple calls to Samsung might eventually reach someone who can think and will actually try to help and NOT immediately suggest "Factory Data Reset". Hope we all get an answer soon. Wish I could have helped more, but maybe my experience will help you narrow down the possibilities

P.S. Samsung.....I anxiously await the fix for "Smart Stay" to recognize that I am looking at my device with my (necessary) eyeglasses.